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diff --git a/kexi/kexidb/queryschemaparameter.h b/kexi/kexidb/queryschemaparameter.h
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+/* This file is part of the KDE project
+   Copyright (C) 2006 Jaroslaw Staniek <js@iidea.pl>
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public License
+   along with this library; see the file COPYING.LIB.  If not, write to
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+*/
+
+#ifndef KEXIDB_QUERYSCHEMAPARAMETER_H
+#define KEXIDB_QUERYSCHEMAPARAMETER_H
+
+#include "queryschema.h"
+
+namespace KexiDB
+{
+
+//! @short A single parameter of a query schema
+class KEXI_DB_EXPORT QuerySchemaParameter
+{
+	public:
+		QuerySchemaParameter();
+		~QuerySchemaParameter();
+
+		QString debugString() const;
+
+		Field::Type type; //!< A datatype of the parameter
+		QString message; //!< A user-visible message that will be displayed to ask for value of the parameter
+};
+
+typedef QValueList<QuerySchemaParameter> QuerySchemaParameterList;
+typedef QValueList<QuerySchemaParameter>::Iterator QuerySchemaParameterListIterator;
+typedef QValueList<QuerySchemaParameter>::ConstIterator QuerySchemaParameterListConstIterator;
+
+//! Shows debug information for \a list
+KEXI_DB_EXPORT void debug(const QuerySchemaParameterList& list);
+
+//! @short An iteratof for a list of values of query schema parameters providing 
+//! Allows to iterate over parameters and return QVariant value or well-formatted string.
+//! The iterator is initially set to the last item because of the parser requirements
+class KEXI_DB_EXPORT QuerySchemaParameterValueListIterator
+{
+	public:
+		QuerySchemaParameterValueListIterator(const Driver& driver, const QValueList<QVariant>& params);
+		~QuerySchemaParameterValueListIterator();
+
+		//! \return previous value
+		QVariant getPreviousValue();
+
+		//! \return previous value as string formatted using driver's escaping
+		QString getPreviousValueAsString(Field::Type type);
+	protected:
+		class Private;
+		Private * const d;
+};
+
+} //namespace KexiDB
+
+#endif